face mask required sign attention not enter without human wearing medical icon protecting themselves |
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| navigate by keyword : face mask people man head required set icon silhouette population public crowd person isolated connections covid coronavirus pollution flu medicine vaccine virus antivirus danger ncov journey test care fever graft treatment health disease biology infection microbe security quarantine warning corona sign button mandatory carefully caution not enter without attention human wearing medical protecting themselves against contamination vector |
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| Face mask required sign. Attention do not enter without a face mask. Human wearing medical mask icon protecting themselves against infection. Coronavirus - COVID-19 virus contamination - vector |
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